precision wr15, wr12 and wr10 waveguide flanges · pdf fileprecision wr15, wr12 and wr10...

Copyright 2017 Maury Microwave Inc., all rights reserved. SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE

e n g i n e e r i n g d a t a 5 E - 0 3 1

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1 M. A. Maury, Jr., and G. R. Simpson, "Improved MillimeterWaveguide Flanges Improve Components and Measurements",Microwave Journal, Vol. 29, No. 5, May 1986.

PRECISION WR15, WR12 AND WR10 WAVEGUIDEFLANGES Typical components bearing the

Maury MPF10 Precision Flanges(WR10, UG387/U)

pattern is omitted. These “A” flanges are recommendedwhenever connections will be made only to otherappropriate precision MPF series flanges since they aremore economical to produce and are offered at a lowerprice.

Figures 1 through 3 show the mechanical details of theflanges. The hole layouts and indexing pin configurationsfor the MPF15, MPF12 and MPF10 are identical. Thesame holds true for the “A” versions. The differences inthe flanges are the waveguide size. Figure 4 is a cross-section view of a mated pair of these flanges showinghow the outer ridge prevents cocking of the matingsurfaces due to uneven torquing of the bolts.

Figure 5 shows the repeatability of a UG-385/U flangein a typical industrial application. Obtaining this datarequired very careful connection by skilled personnel.Figure 6 shows the improvement gained using theMaury indexing pin technique even though connectionswere made quickly and easily with no specialprecautions.

DescriptionThe MPF15, MPF12 and MPF10 precision flanges,designed for use with WR15, WR12 and WR10waveguide respectively, provide a dramaticimprovement in flange connection consistency,repeatability, and flange serviceability compared toUG385/U and UG387/U flanges while still maintainingmating compatibility with this older design.1 Theseflanges incorporate two precision indexing holes andutilize slip fit indexing pins that provide the precisemating alignment required for consistent repeatableconnections. Threaded pins may also be installed in thestandard 4-pin pattern when the MPF precision flangesare mated with the UG385/U and UG387/U flanges.Since both the threaded pins and the precision indexingpins are removable, the flange surface is available formaintenance in the event it is damaged. An outer ridgeprevents the flanges from cocking while the flange boltsare being tightened.

MPF15A, MPF12A and MPF10A are variations to thebasic design that have all the features of the MPF15,MPF12 and MPF10 flanges except that the 4-pin indexing

Features• Provides Precision Alignment• Maintains Mating Compatibility• Allows Servicing of Flange Face• Prevents Cocking of Flanges• Provides Good Contact Pressure• Provides Excellent Repeatability



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Figure 4. Cross section of a mated pair of MPF15, MPF12 and MPF10flanges. Note the outer ridge which prevents the mating surfaces fromcocking during connection.

Figure 3. Side view (typical) of the MPF15A, MPF12A and MPF10Aflanges.

Figure 1. MPF15, MPF12 and MPF10 flanges will mate withUG-385/U and UG-387/U flanges. The 0.0612 pins are removablewhen mating with other precision MPF flanges when 0.0620 index-ing pins are utilized.

Figure 2. MPF15A, MPF12A and MPF10A flanges are designed tomate with other precision MPF flanges and do not include the four-hole indexing pattern.



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Figure 5. Repeatability of a pair of standard UG-385/U flanges using the 4-pin indexing pattern and very careful connection technique.

Figure 6. Repeatability of a pair of Maury MPF15A flanges using the Maury indexing pins and normal connection procedures.



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Figure A – Short Captive Screw (4-40)

Figure B – Threaded Pin 0.0612 Dia.

Figure C – Standard Indexing Pin 0.0620 Dia. (Pin W998-6-3)

Figure D – Pin Vise For Use With 0.0612 dia. Pin

Figure E – Ball Driver (3/32 Hex).

MPF Hardware and Tools

J998S1 Short captive screw 3 AJ998S3 Threaded pin 3 BW996F3 Standard indexing pin 3 CJ998T1 Pin vise DJ998T2 Ball driver (3/32 hex) EJ998H Hardware/tool kit 4 Not shown

FigureModel Description

Instructions for Use

1. Remove the 0.0612 diameter threaded pins(Figure B) using the pin vise (Figure D).

2. Install the indexing pins (Figure C) prior tobolting the flanges together.

3. Four captivated screws (Figure A) should beused to bolt a flange pair together using the balldriver (Figure E).

4. If UG-385/U or UG-387/U compatibility isrequired, use the pin vise (Figure D) to installtwo threaded pins (Figure B).

5. If the flange surface is marred and damaged inany way, remove the pins and lap the surface toa smooth flat finish.

6. NOTE: Recommended practice is not to use the4-pin indexing pattern together with the Mauryindexing pins since the Maury technique ismore accurate and is preferred. Wheneverpractical, the fixed pins should be removedfrom existing flanges and the two precisionholes added.

3 Model number consists of ten (10) each of the part noted.

4 Kit consists of a) 1. ea. pin vise and ball driver, b) 3 ea. shortcaptive screws, threaded pin and indexing pins.

precision wr15, wr12 and wr10 waveguide flanges · pdf fileprecision wr15, wr12 and wr10...

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